Cache all calls to translation file and refresh cache when file changes

app.py

@@ -7,5 +7,5 @@ app = make_app(config)
 
 if __name__ == "__main__":
     port = int(config["PORT"])
-    app.run(port=port)
+    app.run(port=port, extra_files=["translations.yaml"])
     print("Listening on http://localhost:%i" % port)

atst/utils/localization.py

@@ -18,10 +18,7 @@ class LocalizationInvalidKeyError(Exception):
         )
 
 
-translations_yaml_max_cache = 0 if ENV == "dev" else None
-
-
-@lru_cache(maxsize=translations_yaml_max_cache)
+@lru_cache(maxsize=None)
 def _translations_file():
     file_name = "translations.yaml"